CN108220903B - Surface treatment process for metal stamping part of numerical control machine tool - Google Patents

Surface treatment process for metal stamping part of numerical control machine tool Download PDF

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CN108220903B
CN108220903B CN201810031787.6A CN201810031787A CN108220903B CN 108220903 B CN108220903 B CN 108220903B CN 201810031787 A CN201810031787 A CN 201810031787A CN 108220903 B CN108220903 B CN 108220903B
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stamping part
metal stamping
metal
treatment process
surface treatment
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CN108220903A (en
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陈彬
程华
韩年珍
程东华
邱晨健
俞韶华
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Hexian Longsheng Precision Machinery Co Ltd
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Hexian Longsheng Precision Machinery Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/48—Ion implantation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemically Coating (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention provides a surface treatment process for a metal stamping part of a numerical control machine tool, which comprises the steps of pretreatment, shot blasting treatment, diffusion plating treatment, ion injection, surface layer spraying and the like.

Description

Surface treatment process for metal stamping part of numerical control machine tool
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a surface treatment process for a metal stamping part of a numerical control machine tool.
Background
The metal surface treatment agent is a generic term for chemical agents that perform various treatments on the metal surface. The metal surface treatment comprises substrate pretreatment such as oil removal, rust removal, phosphorization, rust prevention and the like, and is prepared for a metal coating technology and a metal protection technology, and the pretreatment quality of the substrate has great influence on the preparation of the coating and the use of metal. At present, the phosphating process is mainly used in the field of metal surface treatment, is simple to operate and has low cost, and a layer of uniform and compact reaction film is formed on the surface of the metal subjected to phosphating treatment, so that the phosphating process is widely used in the industrial field, particularly in the field of metal surface coating, but the phosphating process mainly uses a film forming agent mainly containing phosphate, and the generated phosphating slag has serious pollution to the environment, particularly soil and water sources. In addition, many conventional metal workpieces require mechanical properties in addition to corrosion resistance and rust resistance, and therefore, the metal workpieces also require surface strengthening treatment. However, the surface layer of the existing treatment technology has weak binding force, the strong hardness and the protective performance are difficult to meet the requirements, the service life is short, the repeated maintenance treatment is needed, and the process cost is increased.
Disclosure of Invention
Aiming at the existing problems, the invention provides a surface treatment process for a metal stamping part of a numerical control machine tool, which comprises the steps of pretreatment, shot blasting treatment, diffusion plating treatment, ion injection, surface layer spraying and the like.
In order to achieve the above object, the present invention adopts the following technical solutions:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 20-30min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part after shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.1-1 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 2 multiplied by 1017ion/cm2-3×1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5-10min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Preferably, the volume ratio of the alkaline solution in the step 1) is 1: 2, 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate.
Preferably, the shot in the step 2) is steel shot with the grain diameter of 0.45-0.55 mm.
Preferably, the raw materials of the metal layer diffusion-plated in the step 3) comprise 10-25% of titanium nitride, 5-15% of vanadium nitride, 5-10% of zirconium nitride, 5-15% of silicon carbide, 5-15% of tungsten carbide and the balance of nickel powder.
Preferably, the protective liquid in the step 5) consists of 30-45% of compound treating agent, 15-25% of polyvinyl alcohol solution and the balance of distilled water.
Preferably, the compound treating agent comprises the following components in percentage by weight: 10-20% of sodium lignosulphonate, 4-6% of dimer acid-3-chloro-2-hydroxypropyl monoester, 5-8% of trisodium phosphate, 2-5% of nickel nitrate, 2-5% of stearamide polyoxyethylene ether phosphate, 25-40% of silica sol and the balance of acrylate.
Preferably, the compound treating agent comprises the following components in percentage by weight: 16% of sodium lignosulfonate, 4% of dimer acid-3-chloro-2-hydroxypropyl monoester, 6% of trisodium phosphate, 5% of nickel nitrate, 4% of stearamide polyoxyethylene ether phosphate, 30% of silica sol and the balance of acrylic ester.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: the surface treatment process comprises the steps of pretreatment, shot blasting treatment, diffusion plating treatment, ion injection, surface layer spraying and the like, and the comprehensive mechanical property of the metal stamping part is effectively improved through multiple treatments, so that the metal stamping part has excellent strength, hardness, corrosion resistance and oxidation resistance, and through reasonable raw material selection and proportioning, the interlayer bonding force is strong, the diffusion layer, the injection layer and the spraying layer have good intermolecular bonding effects, the performance improvement degree is high, the stability is strong, and the service life is prolonged.
The shot blasting is carried out after the alkaline leaching treatment, the surface layer of the metal stamping part is good in cleanliness, the reactive area of the surface layer is increased, the combination of diffusion plating is facilitated, metal nitrides and carbides in a diffusion plating layer have excellent strong hardness, the metal nitrides and carbides are directly combined with a metal matrix in a melting secondary mode in the diffusion plating process to form a stable compound, and nitrogen ions are injected later, so that the combination of the diffusion plating layer is guaranteed, the stability of ion migration of the compound in the diffusion plating layer after long-term use is guaranteed, and the strong hardness, the wear resistance, the corrosion resistance and the fatigue resistance of the metal stamping part are effectively improved. Then acid leaching activation is carried out, surface layer spraying is carried out, silica sol, acrylic ester and sodium lignosulfonate are used as main base materials in the coating, the formed spraying liquid is good in dispersity, high in uniformity and excellent in protective performance, an activating agent and a repairing agent are matched, interlayer bonding performance is strong, self-repairing performance of inner layer metal is guaranteed, and the service life is effectively prolonged. The hardness of the metal stamping part treated by the surface treatment process is more than 2650HV, the binding force between the coating and the substrate is more than 93N, and the friction coefficient is less than 0.43.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 20min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part subjected to shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.5 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 3 multiplied by 1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Wherein, the volume ratio of the alkaline solution in the step 1) is 1: 2 of a combination of 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate; the shot in the step 2) is made of steel shot with the grain diameter of 0.5 mm; the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise titanium nitride, vanadium nitride, zirconium nitride, silicon carbide, tungsten carbide and nickel powder, wherein the raw materials comprise 15% of titanium nitride, 10% of vanadium nitride, 10% of zirconium nitride, 15% of silicon carbide, 5% of tungsten carbide and the balance of nickel powder; the protective liquid in the step 5) consists of 30 percent of compound treating agent, 15 percent of polyvinyl alcohol solution and the balance of distilled water, wherein the compound treating agent comprises the following components in percentage by weight: 16% of sodium lignosulfonate, 4% of dimer acid-3-chloro-2-hydroxypropyl monoester, 6% of trisodium phosphate, 5% of nickel nitrate, 4% of stearamide polyoxyethylene ether phosphate, 30% of silica sol and the balance of acrylic ester.
Example 2:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 30min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part subjected to shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.3 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 2 multiplied by 1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Wherein, the volume ratio of the alkaline solution in the step 1) is 1: 2 of a combination of 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate; the shot in the step 2) is made of steel shot with the grain diameter of 0.45 mm; the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise titanium nitride, vanadium nitride, zirconium nitride, silicon carbide, tungsten carbide and nickel powder, wherein the percentage content of each component in the raw materials is 20% of titanium nitride, 15% of vanadium nitride, 8% of zirconium nitride, 10% of silicon carbide, 10% of tungsten carbide and the balance of nickel powder; the protective liquid in the step 5) consists of 45 percent of compound treating agent, 20 percent of polyvinyl alcohol solution and the balance of distilled water, wherein the compound treating agent comprises the following components in percentage by weight: 15% of sodium lignosulfonate, 5% of dimer acid-3-chloro-2-hydroxypropyl monoester, 6% of trisodium phosphate, 4% of nickel nitrate, 4% of stearamide polyoxyethylene ether phosphate, 35% of silica sol and the balance of acrylic ester.
Example 3:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 20min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part subjected to shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.1 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 2 multiplied by 1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Wherein, the volume ratio of the alkaline solution in the step 1) is 1: 2 of a combination of 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate; the shot in the step 2) is made of steel shot with the grain diameter of 0.5 mm; the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise 25% of titanium nitride, 10% of vanadium nitride, 6% of zirconium nitride, 12% of silicon carbide, 15% of tungsten carbide and the balance of nickel powder; the protective liquid in the step 5) consists of 35 percent of compound treating agent, 25 percent of polyvinyl alcohol solution and the balance of distilled water, wherein the compound treating agent comprises the following components in percentage by weight: 10% of sodium lignosulfonate, 5% of dimer acid-3-chloro-2-hydroxypropyl monoester, 5% of trisodium phosphate, 3% of nickel nitrate, 2% of stearamide polyoxyethylene ether phosphate, 40% of silica sol and the balance of acrylic ester.
Example 4:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 30min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part subjected to shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.8 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 3 multiplied by 1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 10min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Wherein, the volume ratio of the alkaline solution in the step 1) is 1: 2 of a combination of 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate; the shot in the step 2) is made of steel shot with the grain diameter of 0.55 mm; the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise titanium nitride, vanadium nitride, zirconium nitride, silicon carbide, tungsten carbide and nickel powder, wherein the percentage content of each component in the raw materials is 15% of titanium nitride, 5% of vanadium nitride, 5% of zirconium nitride, 5% of silicon carbide, 10% of tungsten carbide and the balance of nickel powder; the protective liquid in the step 5) consists of 40 percent of compound treating agent, 20 percent of polyvinyl alcohol solution and the balance of distilled water, wherein the compound treating agent comprises the following components in percentage by weight: 20% of sodium lignosulfonate, 6% of dimer acid-3-chloro-2-hydroxypropyl monoester, 8% of trisodium phosphate, 2% of nickel nitrate, 5% of stearamide polyoxyethylene ether phosphate, 25% of silica sol and the balance of acrylic ester.
Example 5:
a surface treatment process for a metal stamping part of a numerical control machine tool comprises the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 20min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part subjected to shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 1 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 2 multiplied by 1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
Wherein, the volume ratio of the alkaline solution in the step 1) is 1: 2 of a combination of 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate; the shot in the step 2) is made of steel shot with the grain diameter of 0.45 mm; the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise titanium nitride, vanadium nitride, zirconium nitride, silicon carbide, tungsten carbide and nickel powder, wherein the percentage content of each component in the raw materials is 20% of titanium nitride, 8% of vanadium nitride, 8% of zirconium nitride, 10% of silicon carbide, 15% of tungsten carbide and the balance of nickel powder; the protective liquid in the step 5) consists of 35 percent of compound treating agent, 15 percent of polyvinyl alcohol solution and the balance of distilled water, wherein the compound treating agent comprises the following components in percentage by weight: 18% of sodium lignosulfonate, 4% of dimer acid-3-chloro-2-hydroxypropyl monoester, 5% of trisodium phosphate, 4% of nickel nitrate, 3% of stearamide polyoxyethylene ether phosphate, 35% of silica sol and the balance of acrylic ester.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. A surface treatment process for a metal stamping part of a numerical control machine tool is characterized by comprising the following steps:
1) pretreatment: soaking the metal stamping part in alkali liquor for 20-30min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, and drying with hot air;
2) shot blasting treatment: performing shot blasting treatment on the dried metal stamping part;
3) and (3) diffusion coating treatment: taking the metal stamping part after shot blasting treatment as a diffusion metal layer, wherein the thickness of the diffusion metal layer is 0.1-1 mm;
4) ion implantation: injecting nitrogen ions into the metal stamping part after diffusion plating, wherein the injection amount is 2 multiplied by 1017ion/cm2-3×1017ion/cm2；
5) Surface layer spraying: and (3) soaking the metal stamping part subjected to nitrogen injection in acid liquor for 5-10min, taking out, washing with clear water for 2-3 times, sequentially wiping with acetone and alcohol, washing with deionized water for 1-2 times, drying with hot air, spraying protective liquid on the surface layer of the dried metal stamping part, and drying to form a film.
2. The surface treatment process for metal stampings of numerically controlled machine tools according to claim 1, characterized in that: in the step 1), the volume ratio of the alkaline solution is 1: 2, 7.5mol/L sodium bicarbonate and 15mol/L sodium carbonate.
3. The surface treatment process for metal stampings of numerically controlled machine tools according to claim 1, characterized in that: the shot in the step 2) is made of steel shot with the grain diameter of 0.45-0.55 mm.
4. The surface treatment process for metal stampings of numerically controlled machine tools according to claim 1, characterized in that: the raw materials of the metal layer which is subjected to the diffusion coating in the step 3) comprise 10-25% of titanium nitride, 5-15% of vanadium nitride, 5-10% of zirconium nitride, 5-15% of silicon carbide, 5-15% of tungsten carbide and the balance of nickel powder.
5. The surface treatment process for metal stampings of numerically controlled machine tools according to claim 1, characterized in that: in the step 5), the protective liquid consists of 30-45% of compound treating agent, 15-25% of polyvinyl alcohol solution and the balance of distilled water.
6. The surface treatment process for metal stamping parts of numerical control machine tools according to claim 5, wherein the compound treating agent comprises the following components in percentage by weight: 10-20% of sodium lignosulphonate, 4-6% of dimer acid-3-chloro-2-hydroxypropyl monoester, 5-8% of trisodium phosphate, 2-5% of nickel nitrate, 2-5% of stearamide polyoxyethylene ether phosphate, 25-40% of silica sol and the balance of acrylate.
7. The surface treatment process for metal stamping parts of numerical control machine tools according to claim 6, wherein the compound treatment agent comprises the following components in percentage by weight: 16% of sodium lignosulfonate, 4% of dimer acid-3-chloro-2-hydroxypropyl monoester, 6% of trisodium phosphate, 5% of nickel nitrate, 4% of stearamide polyoxyethylene ether phosphate, 30% of silica sol and the balance of acrylic ester.
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CN106011628A (en) * 2016-07-06 2016-10-12 安徽红桥金属制造有限公司 High-tenacity steel automobile hardware stamping part and preparation process thereof
CN106048577A (en) * 2016-07-06 2016-10-26 安徽红桥金属制造有限公司 Hardware stamping part surface treatment process
CN106435466A (en) * 2016-08-19 2017-02-22 重庆大有表面技术有限公司 Steel surface modification structure formed by zinc and nickel permeation layer and preparation method of steel surface modification structure
CN106928758A (en) * 2017-03-23 2017-07-07 周楠 Metallic stamping pieces surface conditioning agent and process of surface treatment

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